LSI SAS 2008 (mfi) on SuperMicro X8SI6-F

Kenneth D. Merry ken at
Fri Feb 18 16:49:41 UTC 2011

On Thu, Feb 17, 2011 at 11:07:21 -0800, Rumen Telbizov wrote:
> Hello Damien, list:
> I've been following this discussion with great interest and I hope the
> result of it
> will be the merge of a stable driver in STABLE branch soon.
> I brought this not a long ago (
> and I was hoping to have this driver in 8.x before 8.3 release.

It is in -stable now, and so should be in 8.3.  We didn't make it in time
for 8.2 unfortunately.

> > What is sad is that these controllers are becoming very mainstream now,
> > we're getting them more and more on Dell servers , and the fbsd project
> > still struggles with them (for reasons I don't know, might be LSI's
> > fault, might be a lack of resources or interest...)
> >
> I couldn't agree more. I've been testing those (9211-8i) myself here on a
> bunch of SuperMicro
> servers and I'd say that I am very pleased with the performance of those
> HBAs (not the mention the
> price ~$230-250 CAD). On a 12 x SAS disks with a direct attached backplane
> 826A (6Gbit SAS2.0)
> in RAID0 across all of them (md linux software raid) I was able to squeeze *
> 2.1GBytes/s* sequential write
> (dd kind of style write). With the same setup and SATA disks I get to
> 1.2GByte/s. I did use 2 controllers
> to accomodate ports for all the disks. I get the same speed with ZFS and
> 9.0-CURRENT.
> On a related note I must say that I do have serious problems with the
> bandwidth when I use
> the SAS expander version of this backplane (826E26) (I cannot get more than
> 200-250 MBytes/s).
> I've been investigating this problem with LSI's help and still no
> conclusion. It looks like I am using
> only one channel.
> Anyway this was just my humble attempt to encourage the MFC of this driver.
> I think the card is
> pretty good. I'd like to hear other people's opinion on this HBA though.

MFC is done, try it out and let me know if there are any problems.


Kenneth Merry
ken at FreeBSD.ORG

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